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I would guess its to replace or augment the "Send Tab to Device" functionality of stock Firefox so that the user can easily get the same page onto their phone or other device without a Mozilla account.

Ah-ha, ok, makes sense. Thanks!

Hey pulse dev here, actually the guy who inserted QR Code Generator xd. There were suggestions around adding a qr generator to the browser for sharing urls irl easily. This was also something that replaced our emoji picker as it was hard to maintain, unoptimized and we deemed this more productive.

Thanks for confirming! And yep, makes sense as a url sharing mechanism. Cheers, and good luck with this browser; the more diversity in the browser world, the better!

Probably to share URLs quickly with a mobile device without needing to sync things?

Yeah, makes sense. Thanks!

It's a reliable way to send links to almost any device with a camera.